Mobile payments, those made from a phone and typically via NFC, haven't exactly had a huge impact on the average American consumer just yet, but look past that and you'll see a battle is brewing. Google had been making the most noise, with its Google Wallet, but today the competing service Isis just launched its first proper salvo. The T-Mobile version of the Galaxy S II is currently receiving an OTA update (T989UVLH1) that, among a few other tweaks, enables support for Isis NFC payments, making it the first such device on the market. Many more are inbound from AT&T and Verizon as well, setting the stage for an epic virtual currency battle that only the peaceniks at the Mobile Payments Committee stand a chance of mitigating.